# Proposed AD 98-CE-30-AD: Pilatus Aircraft Ltd. Model PC-7 Airplanes

- Type: Proposed airworthiness directive (not in force)
- Status: Became AD 98-16-16
- Action: Notice of proposed rulemaking (NPRM).
- Published: May 29, 1998, 63 FR 29360
- Comments due: July 3, 1998
- Became: [AD 98-16-16](https://openairdocs.org/ad/98-16-16)
- Docket: 98-CE-30-AD
- FR document: 98-14192
- Official PDF: https://openairdocs.org/files/sha256/7c/13/7c13685287d8c2612f30b6b12f0e2ec62463186bcb676f1e564c99e168f6000b (from https://www.govinfo.gov/content/pkg/FR-1998-05-29/pdf/98-14192.pdf)
- Federal Register: https://www.federalregister.gov/documents/1998/05/29/98-14192/airworthiness-directives-pilatus-aircraft-ltd-model-pc-7-airplanes
- Page: https://openairdocs.org/proposed/98-CE-30-AD

## Summary

This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Pilatus Aircraft Ltd. Model PC-7 airplanes. The proposed AD would require replacing the seal unit on both main landing gear (MLG) legs and the nose landing gear (NLG) leg. The proposed AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for Switzerland. The actions specified by the proposed AD are intended to prevent MLG or NLG failure caused by deterioration of a MLG or NLG leg seal unit, which could result in damage to the airplane or airplane controllability problems during takeoff, landing, or taxi operations.

## Notices in this docket

- May 29, 1998: Notice of proposed rulemaking (NPRM). (first notice), FR document 98-14192, comments due Jul 3, 1998 (https://www.federalregister.gov/documents/1998/05/29/98-14192/airworthiness-directives-pilatus-aircraft-ltd-model-pc-7-airplanes)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.